Nanoalumina supported palladium(0) nanoparticle catalyst for releasing H-2 from dimethylamine borane

Date

2019-09-01

Author

KARABOĞA, SEDA
Özkar, Saim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

203
views

0
downloads

Palladium(II) 2,4-pentanedionate, impregnated on alumina nanopowder, was reduced by dimethylamine borane (DMAB) forming Pd(0) nanoparticles (NPs) at room temperature. Pd(0) NPs could be isolated from solution and characterized by ATR-IR, UV-vis, XRD, SEM, TEM, XPS and BET. The results obtained from TEM images reveal the formation of palladium(0) nanoparticles on gamma-alumina, having a mean particle size of 7.1 +/- 2.6 nm. Alumina supported Pd(0) NPs with various metal loadings were employed as catalyst in dehydrogenation of DMAB at room temperature and the sample with 5.0% wt. Pd provides the highest turnover frequency (TOF = 73 h(-1)) at 25.0 +/- 0.5 degrees C. Kinetics of the catalytic dehydrogenation was also investigated depending on Pd concentration and temperature to determine the kinetic parameters of the H-2 release reaction.

Subject Keywords

Hydrogen generation, Palladium(0) nanoparticles, Heterogeneous catalyst, Dimethylamine borane, Dehydrogenation

URI

https://hdl.handle.net/11511/41006

Journal

APPLIED SURFACE SCIENCE

DOI

https://doi.org/10.1016/j.apsusc.2019.05.087

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Nanoalumina-supported rhodium(0) nanoparticles as catalyst in hydrogen generation from the methanolysis of ammonia borane Ozhava, Derya; Özkar, Saim (2017-10-01) Rhodium(0) nanoparticles were in situ formed from the reduction of rhodium(II) octanoate and supported on the surface of nanoalumina yielding Rh(0)/nanoAl(2)O(3) which is highly active catalyst in hydrogen generation from the methanolysis of ammonia borane at room temperature. The kinetics of nanoparticle formation can be followed just by monitoring the volume of hydrogen gas evolved from the methanolysis of ammonia borane. The evaluation of the kinetic data gives valuable insights to the slow, continuous n...
Palladium(0) nanoparticles supported on ceria: Highly active and reusable catalyst in hydrogen generation from the hydrolysis of ammonia borane Tonbul, Yalcin; Akbayrak, Serdar; Özkar, Saim (2016-07-13) Palladium(0) nanoparticles supported on nanoceria (Pd-0/CeO2) were prepared by the impregnation of palladium(II) ions on the surface of ceria followed by their reduction with sodium borohydride in aqueous solution at room temperature. Pd-0/CeO2 were isolated from the reaction solution by centrifugation and characterized by ICP-OES, XRD, TEM, SEM-EDS and XPS techniques. All the results reveal that palladium(0) nanoparticles were uniformly dispersed on ceria and the resulting Pd-0/CeO2 are highly active and r...
Palladium(0) nanoparticles supported on polydopamine coated Fe3O4 as magnetically isolable, highly active and reusable catalysts for hydrolytic dehydrogenation of ammonia borane Manna, Joydev; Akbayrak, Serdar; Özkar, Saim (2016-01-01) Magnetic ferrite nanopowders were coated with polydopamine which is inert against the hydrolysis of ammonia borane. Coating of ferrite powders was achieved by pH-induced self-polymerization of dopamine hydrochloride at room temperature. Palladium(0) nanoparticles supported on polydopamine coated ferrite (Pd-0/PDA-Fe3O4) were prepared by impregnation of palladium(II) ions on the surface of PDA-Fe3O4 followed by their reduction with sodium borohydride in aqueous solution at room temperature. Magnetically isol...
Palladium nanoparticles supported on cobalt(II,III) oxide nanocatalyst: High reusability and outstanding catalytic activity in hydrolytic dehydrogenation of ammonia borane Akbayrak, Serdar; Özkar, Saim (2022-11-01) A new palladium(0) nanocatalyst is developed to enhance the catalytic efficiency of precious metal catalysts in hydrogen generation from the hydrolytic dehydrogenation of ammonia borane. Magnetically separable Pd-0/Co3O4 nanocatalyst can readily be obtained by the reduction of palladium(II) cations impregnated on cobalt(II, III) oxide at room temperature. The obtained Pd-0/Co3O4 nanocatalyst with 0.25% wt. palladium loading has outstanding catalytic activity with a record turnover frequency of 3048 min(-1) ...
Zeolite confined palladium(0) nanoclusters as effective and reusable catalyst for hydrogen generation from the hydrolysis of ammonia-borane Rakap, Murat; Özkar, Saim (2010-02-01) Zeolite confined palladium(0) nanoclusters were prepared by a two step procedure: incorporation of Pd2+ ions into the zeolite-Y by ion-exchange followed by the reduction of Pd2+ ions in the supercages of zeolite-Y with sodium borohydride at room temperature. Zeolite confined palladium(0) nanoclusters are stable enough to be isolated as solid materials and characterized by ICP-OES, XRD, HRTEM, SEM, X-ray photoelectron spectroscopy and N-2 adsorption technique. These nanoclusters are isolable, redispersible a...

Citation Formats

S. KARABOĞA and S. Özkar, “Nanoalumina supported palladium(0) nanoparticle catalyst for releasing H-2 from dimethylamine borane,” APPLIED SURFACE SCIENCE, pp. 433–441, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41006.